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html - Spacer 不接受 CSS 中的边距

问题描述

我的垫片不会使用给定的边距标签。我正在使用引导程序，因此它可能会干扰我的边距标签。如果我在我的 topnav 和主页内容之间给一个 div 一个带有 20px margin-top 的间隔类标签，它将不起作用。我也尝试过 View Height 而不是 px ，但这也行不通。我也尝试过替换主内容容器中的 div ，但这也不起作用。提前致谢！

body {
  margin: 0;
  background-color: #cccaca;
}

/* Add a black background color to the top navigation */
.topnav {
    color: #333;
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
  }
  
/* Style the links inside the navigation bar */
.topnav a {
  float: left;
  color: #333;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
  font-family: Arial, Helvetica, sans-serif;
}
  
/* Change the color of links on hover */
.topnav a:hover {
  color: #ddd;
  color: black;
  font-family: Arial, Helvetica, sans-serif;
}
  
/* Add a color to the active/current link */
.topnav a.active {
  color: #222;
  font-family: Arial, Helvetica, sans-serif;
}

.spacer-top {
  margin-top: 70px;
}

.spacer-topnav {
  margin-top: 15px;
}

.Spacer-Nav-To-Content {
  margin-top: 20px;
}
<!DOCTYPE html>
<html>
<header>
    <meta charset="utf-8"/>
    <link rel="stylesheet" href="css/index.css">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css" integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2" crossorigin="anonymous">
    
</header>
<body>
    <div class="spacer-top"></div>
    <div class="container">
    <div class="row">
        <div class="col-md-auto">
            <h3>....</h3>
            <h4>Developer</h4>
        </div>
        <div class="col-sm-8">
            <!--TOPNAV-->
            <div class="topnav spacer-topnav">
                <a class="active" href="#home">Home</a>
                <a href="#news">CV/Resumé</a>
                <a href="#projects">Projects</a>
                <a href="#contact">Contact</a>
                <a href="#about">About</a>
            </div>
        </div>
    </div>
    </div>
    <div class="Spacer-Nav-To-Content"></div>
    <div class="container">
    <div class="row">
        <div class="col-md-auto">
            <img src="images/Profile_foto.png" alt="Profile Picture">
        </div>
        <div class="col-6">
            <h2><b>Hello,</b></h2>
            <h3><i>Here is a bit about me:</i></h3>
        </div>
    </div>
    </div>


<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.min.js" integrity="sha384-w1Q4orYjBQndcko6MimVbzY0tgp4pWB4lZ7lr30WKz0vr/aWKhXdBNmNb5D92v7s" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>
</body>
</html>

标签： htmlcss

解决方案

尝试在您的 CSS 代码中使用 !important。

.spacer-top {margin-top: 70px !important;}

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